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use crate::{parse_fnames::convert_to_url, Markdown};
use fehler::throws;
use gm_docs_parser::*;
use scraper::{ElementRef, Html, Node, Selector};
use std::path::Path;
use url::Url;
#[throws(Box<dyn std::error::Error>)]
pub fn parse_constants(base_path: &Path, constants: &mut Vec<GmManualConstant>) {
for file in std::fs::read_dir(base_path)? {
let file = file?;
let file_type = file.file_type()?;
if file_type.is_dir() {
parse_constants(&file.path(), constants)?;
} else if file_type.is_file() {
let path = file.path();
if path.extension().map(|e| e == "htm").unwrap_or_default() {
parse_constant(&file.path(), base_path, constants);
}
}
}
}
#[allow(dead_code)]
fn parse_constant(fpath: &Path, base_path: &Path, constants: &mut Vec<GmManualConstant>) {
let doc = Html::parse_document(&std::fs::read_to_string(fpath).unwrap());
for table in doc.select(&Selector::parse("table").unwrap()) {
let link = convert_to_url(base_path, fpath);
parse_inner(table, link, constants);
}
fn parse_inner(
table: ElementRef,
link: Url,
constants: &mut Vec<GmManualConstant>,
) -> Option<()> {
let table_body = table.children().nth(1).unwrap();
let mut trs = table_body.children();
// skip the newline
trs.next(); // bye bye bitch
// find the header...
let order = trs
.next()
.and_then(|header| {
header.children().find(|c| {
if let Some(e) = c.value().as_element() {
e.name() == "th"
} else {
false
}
})
})
.and_then(|th| {
let is_constant = th
.first_child()
.map(|header_v| {
let mut header = Markdown::convert_to_markdown(&header_v);
header.make_ascii_lowercase();
header.contains("constant")
})
.unwrap_or_default();
if is_constant {
let mut order = vec![Order::Constant];
let mut th = th;
while let Some(sibling) = th.next_sibling() {
if let Node::Element(e) = sibling.value() {
if e.name() == "th" {
if let Some(next_header) = sibling
.first_child()
.map(|v| Markdown::convert_to_markdown(&v))
{
if next_header.to_lowercase().contains("description") {
order.push(Order::Description);
} else {
order.push(Order::Other(next_header));
}
} else {
break;
}
} else {
break;
}
}
th = sibling;
}
Some(order)
} else {
None
}
});
if let Some(order) = order {
for tr in trs {
let mut caret = 0;
let mut constant_doc = GmManualConstant {
name: String::new(),
description: String::new(),
secondary_descriptors: None,
link: link.clone(),
};
if tr.value().is_element() {
for td in tr.children() {
// there are Text(\n) hiddin in the trs
if td.value().is_element() {
let data = Markdown::convert_to_markdown(&td);
match &order[caret] {
Order::Constant => {
constant_doc.name = data;
}
Order::Description => {
constant_doc.description = data;
}
Order::Other(e) => {
constant_doc
.secondary_descriptors
.get_or_insert_with(Default::default)
.insert(e.clone(), data);
}
}
caret += 1;
}
}
// clean up the constant...
if constant_doc.name.starts_with('`') && constant_doc.name.ends_with('`') {
constant_doc.name =
constant_doc.name[1..constant_doc.name.len() - 1].to_owned();
}
if let Some(inner) = &mut constant_doc.secondary_descriptors {
*inner = inner
.clone()
.into_iter()
.filter(|(k, v)| !(k.trim().is_empty() || v.trim().is_empty()))
.collect();
if constant_doc.description.trim().is_empty() && inner.is_empty() == false {
constant_doc.description =
inner.remove(&inner.keys().next().unwrap().clone()).unwrap();
}
if inner.is_empty() {
constant_doc.secondary_descriptors = None;
}
}
constants.push(constant_doc);
}
}
}
Some(())
}
}
#[derive(Debug)]
enum Order {
Constant,
Description,
Other(String),
}